Fix and Improve Streaming Rpc

[GabrielePicco]

Fix and Improve Streaming Rpc

Status	Type	⚠️ Core Change	Issue
Ready	Feature	No	magicblock-labs/Solana.Unity-SDK#184, magicblock-labs/Solana.Unity-SDK#182, magicblock-labs/Solana.Unity-SDK#183

Problem

• See [Bug] WebSocket connection does not handle errors well and there is no retry  Solana.Unity-SDK#184, Localhost option in dropdown Solana.Unity-SDK#182, Global default commitment for the StreamingRpc  Solana.Unity-SDK#183 for detailed descriptions

Solution

• Default values for localhost
• WebSockets now try to reconnect when losing connection
• Global settable default Commitment for IStreamingRpc
• Several fixes in the Websockets, removed the need for a dispatcher object and replaced infinite loop with events

[coveralls]

Pull Request Test Coverage Report for Build 6842193663

• 12 of 81 (14.81%) changed or added relevant lines in 4 files are covered.
• 5 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.1%) to 73.507%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/Solana.Unity.Rpc/Core/Sockets/SubscriptionState.cs	0	2	0.0%
src/Solana.Unity.Rpc/Core/Sockets/StreamingRpcClient.cs	1	8	12.5%
src/Solana.Unity.Rpc/Core/Sockets/WebSocketWrapper.cs	1	26	3.85%
src/Solana.Unity.Rpc/SolanaStreamingRpcClient.cs	10	45	22.22%

Files with Coverage Reduction	New Missed Lines	%
src/Solana.Unity.Rpc/Core/Sockets/WebSocketWrapper.cs	1	1.47%
src/Solana.Unity.Rpc/SolanaStreamingRpcClient.cs	4	3.45%

Totals
Change from base Build 6770452796:	-0.1%
Covered Lines:	4992
Relevant Lines:	6491

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💛 - Coveralls